Lock.



H. G. VOIGHT & N. B. HURD.

LOCK.

' APPLICATION FILED 00126, 1911.

1 24,467. Patented Apr. 23, 1912.

2 SHEETS-SHEET 1.

H 6*. Vow/97 S HfGLVOIGHT & N. B. HURD.

v LOGK. APPLICATION FILED 0GT.26, 1911.

, 1,024,467. Patented Apr. 23, 1912;

2 sHBETsHsHEBT' 2.

lmli COLUMBIA PLANOURAPH 10.. WASHINGTON. D. c.

UNITED STATES PATENT OFFICE.

HENRY Gr. VOIGI-IT AND NORMAN B. HURD, OF NEW BRITAIN, CONNECTICUT, ASPSIGNORS TO RUSSELL & ERWIN MANUFACTURING COMPANY, OF NEW BRITAIN,CONNECTICUT, A CORPORATION OF CONNECTICUT.

LOCK.

Specification of Letters Patent.

Patented Apr. 23, 1912.

To all whom it may concern:

Be it known that we, HENRY G. Vororrr and NORMAN B. HURD, citizens ofthe United States, residing at New Britain, county of Hartford, State ofConnecticut, have invented certain new and useful Improvements in Locks,of which the following is a full, clear, and exact description.

Our invention relates to improvements in looks, and is particularlyconcerned with a lock specially adapted for use on the door of a privatebathroom communicating with a hotel apartment.

The object of the invention is to provide means whereby the bathroomdoor may be locked from the inside against unlocking by the maids orhousekeepers key, but at the same time in case of emergency the door maybe unlocked by the use of a guard key usually retained at the ofiice ofthe hotel, or by a so-called emergency key in the hands of theproprietor of the hotel.

A further object is to provide means whereby the door may be locked bythe holder of the guard or emergency key so that it cannot be unlockedfrom the apartment side by any except the guard or em rgency keys,whereby the bathroom may be closed against use when the apartment isrented without the bath.

A further object is to provide means whereby the door may be unlockedfrom the inner or bathroom side at all times, notwithstanding it mayhave been locked from the apartment side by any of the keys adapted tothe lock.

With these objects in view, the invention consists in the constructionand arrangement of parts, a preferred embodiment of which is illustratedin the accompanying drawings, in which Figure 1 is a side elevation ofthe lock complete, the cover plate being removed tumblers. Fig. 7comprises a side and edge View of another tumbler lever. Fig. 8 is aview of the dead bolt detached. Fig. 9 is a view of a thumb-turnroll-back used in the lock. Fig. 10 is a fragmentary view of the coverplate showing the key hole therein. Figs. 11, 12, 13, 14 and 15 comprisefragmentary views of the bitting of the guest, lmaids, housekeepers,guard and emergency :eys.

In the embodiment of our invention herein selected for illustration, 1indicates the lock case, 2 the face plate, 3 the ordinary latch boltused in looks of this character and adapted to be operated by a rollback4.

5 indicates the dead bolt slidably mounted on a stud 6 on the lock case.

7 is a stud on the lock case, upon which the upper set of tumblers whichcooperate with the racking stump 8 of the dead bolt are mounted. Thesetumblers comprise several of the ordinary gated tumblers 9, and includedin this set of tumblers is a socalled emergency tumbler 10, such asillustrated in Fig. 2, having an emergency tongue 11, which cooperateswith the racking stump 8 in the manner hereinafter de scribed. Upon asecond stud 12 is mounted a second set of tumblers, one of which, 13, isprovided with an end projection 14, which engages a notch 15 in atumbler connecting bar 16, see Fig. 4. The emergency tumbler 10 liesbelow one or more of the gated tumblers, and has a projection 17 whichalines with a slot 16 in the tumbler connecting bar 16, so that whenthis tumbler bar only is actuated, as hereinafter described, theemergency tumbler 10 is not raised. Below the lower set of tumblers. isa thumbturn roll-back 18 having a thumbturn (not shown) extending to theinner or bathroom side of the door only. This thumb-turn, as will beseen from an inspection of Figs. 1 and 9, always operates the tumbler13, and consequently, through the tumbler bar 16, likewise operates thegated tumblers of the upper set, each of which is provided with anextension such as 9 adapted to be engaged by the upper end of thetumbler bar 16. Hence, when the thumb-turn is turned from the inside, itserves to release the tumblers of the upper set from the racking stump8, thus permitting pro ection and retraction of the dead bol" 5 It isdesirable, when the bathroom is occupied, that entrance thereto bebarred against the holders of the maids or housekeepers keys. To thisend there is included in the lower set of tumblers a tumbler 19, Fig. 7,which is pivoted upon a stud 20 on the lock case, said stud projectingthrough a slot 21 on the dead bolt, so that the latter is tree to moveforward or back. The tumbler 19 is provided at one side of the pivot 20with a stud 22, which extends through slots such as 23 in several of thetumblers, such as 2%, of the lower set. The rear end of the tumbler 19is provided with a projection 25, which extends into a notch 26, lfig.5, of a companion tumbler bar 27. This tumbler bar is provided with acutaway portion 28, which allows free play of the projection 14 of thetumbler 13, whereby the latter tumbler does not operate the secondtumbler bar 27. The upper end 27 of the tumbler bar is solid, andthereby engages the projections 9 of all oi the gated tumblers of theupper set and also the shoulder 17 of the emergency tumbler. Thetumblers such as 2 1 of the lower set, are normally held by theirsprings 24: in the position indicated in Figs. 1 and 2, wherein the stud22 of the tumbler 19 lies in the upper ends of the slots such as 23 insaid tumblers 2 1, so that when said tumblers 2 1 are depressed, ashereinafter described, the tumbler lever 19 is tilted and thus raisesthe tumbler bar 27, which in turn raises the gated tumblers ot the upperset to free the racking stump 8 therefrom, and also raises the emergencytumbler.

The cover or outside plate of the lock is provided with a double-ended.key-hole 29, Fig. 10, and opposite the upper end of said key-hole is akey post 30, while opposite the lower end of said key-hole is a keypinre ceiving aperture 31 in the back plate of the lock. The guest,guardand emergency keys are of the drill pin type, and may be inserted in thekey-hole 29 in normal position, taking over the key post 30, while themaids and housekeepefs keys are 01 the solid pin type and are adapted tobe inserted in the keyhole 29 in inverted position, the solid pinshaving a bearing in the pin aperture 31. The guard and emergency keysoperate directly upon the upper set of tumblers in projecting andretracting the dead bolt, whereas the maids and housekeepers keysoperate on the tumblers 21 of the lower set, and consequently, throughthe tumblers 19 and tumbler bar 27, indirectly operate the tumblers .otthe upper set. Furthermore, the guard and emergency keys are so bittedthat they do not raise the emergency tumbler 10 when projecting the deadbolt, so that when the dead bolt is projected by them the emergencytongue 11 of the emergency tumbler lies below the racking stump 8. When,on the other hand, the upper set of tumblers are operated by the tumblerbar 27 through the agency of the tumbler 19 when actuated by the maidsor housekeepers keys, the emergency tumbler is raised so that theracking stump 8 takes a position below the emergency tongue 11, asindicated in Fig. 2. Hence when the dead bolt is projected by the guardor emergency keys, it cannot be retracted by the maids or housekeepeflskeys, since these keys are blocked by the position of the emergencytongue relative to the racking stump.

The thumb-turn roll-back 18 is provided with notches 32, Fig. 9, whichare alined with the tumbler 19 of the lower set. The upper roll-backarms of this roll-back, however, are arranged to engage the tumbler 13,hence when the thumb-turn roll-back is operated to project the latchbolt, it simultaneously operates the tumbler 13 and thereby the tumblerbar 16, which in turn frees the racking stump 8 from the gated tumblersot the upper set. This tumbler bar 16, by reason of its notch 18, doesnot raise the emergency tumbler 10, and furthermore, since theroll-back, by reason of its notch 32, does not operate the tumbler 19,the operation of the roll-back in projecting the dead bolt does notraise the emergency tumbler 10, so that the dead bolt so operated cannotbe retracted by the maids or housekeepers keys, but can be retracted bythe guard or emergency key.

From the above described construction it will be seen that, while thebathroom door may be locked by the occupant of the bathroom against themaids and housekeepers keys, it may be unlocked from the outside in case01 emergency by the guard or emergency key. Furthermore, since thethumbturn roll-back may only be operated from the inner or bathroom sideof the door, the door may be locked by the guard and emergency keysagainst unlocking by any but the guard and emergency keys; hence the private bathroom cannot be surreptitiously thrown into communication withthe apartment by the holders of the maids or housekecpers keys. 1; isunderstood, moreover, that the guest key to the corridor door lock isincapable of locking or unlocking the bathroom door lock. This may beprovided for by locating short studs in the path of the ward of theguest key and so hitting said key that it cannot clear theseprojections, although the other keys of the series are bitted to clearthem.

Vi hile we have herein described a preterred embodiment of ourinvention, it is to be understood that the same may be altered in detailand relative arrangement of parts without departing from the spirit orscope of the appended claims.

\Vhat we claim is:

1. In a lock, the combination with a cas ing, of a dead bolt, two setsof tumblers therefor, one of said sets including an emergency tumblerprovided with a part adapted to be so positioned as to block theoperation of said dead bolt by certain keys, connecting means for saidtumblers, a key-hole at one side only of said casing, a plurality ofkeys including a maids, housekeepers, guard and emergency key, saidkey-hole being constructed to receive certain of said keys in normalposition only to operate directly upon the upper set of tumblers andbeing constructed to receive other of sald keys in inverted positiononly to operate directly upon the lower set of tumblers, said firstmentioned keys operating directly upon said upper set of tumblers beingbitted as to so position the emergency tumbler, in projecting the deadbolt, as to block operation of the other keys, said maids andhousekeepers keys being so bitted as to position the emergency tumbler,in projecting the dead bolt, as to permit retraction thereof by any ofthe keys, and a thumb-turn on the side of the lock opposite the key-holeprovided with means for projectingand retracting the dead bolt andconstructed and arranged to position the emergency tumbler, inprojecting the dead bolt, to prevent retraction thereof byany exceptsald first mentioned keys.

2. In a lock, the combination with a casing of a dead bolt, two sets oftumblers therefor, connecting means for said sets, a key-hole at oneside of said casing only, a plurality of keys including a maids,housekeepers, guard and emergency key, said key-hole being constructedto receive certain of said keys to operate only on one set of saidtumblers, and the other of said keys to operate only on the other set oftumblers, one of said sets of tumblers including an emergency tumblerprovided with a part adapted to be so positioned as to block theoperation of said dead bolt by certain keys and adapted to be operatedby the first mentioned group of keys to prevent retraction of the boltby the second group of keys,

the second set of tumblers including a tumbler adapted to operate saidconnecting means to in turn operate said first set of tumblers includingthe emergency tumbler so that the bolt may be retracted by any of saidset of keys, and a thumb-turn arranged to operate upon the second set oftumblers and through said connecting means to 0perate the first set oftumblers, including the emergency tumbler, so that the dead bolt may beretracted only by certain of said keys.

3. In a lock, the combination with a casing of a dead bolt, an upper andlower set of tumblers therefor, one of said sets including an emergencytumbler provided with a part adapted to be so positioned as to block theoperation of said dead bolt by certain keys, a pair of connecting barsfor said tumbler sets, a key-hole at one side only of said casing, athumb-turn roll-back operable only from the opposite side of saidcasing, a plurality of keys including a maids, housekeepers, guard andemergency key, said keyhole being adapted to receive the guard andemergency keys to operate directly upon the upper set of tumblers and toreceive the maids and housekeepers keys to operate directly upon thelower set of tumblers, said lower set of tumblers including a tumbleradapted to operate said connecting bar to raise said emergency tumblerin projecting the dead bolt, said guard and emergency keys being sobitted as not to raise the emergency tumbler in projecting the dead boltwhereby the dead bolt is blocked against operation by said maids andhousekeepers key and may be retracted only by the guard and emergencykeys when projected by said keys, said thumb-turn being arranged toproject the dead bolt without raising said emergency tumbler wherebysaid bolt may be retracted only by the said thumb-turn or by said guardor emergency keys when projected by said thumb-turn.

4C. In a lock, the combination with a casing of a dead bolt, an upperand lower set of tumblers therefor, one of said sets including anemergency tumbler provided with a part adapted to be so positioned as toblock the operation of said dead bolt by certain keys, tumblerconnecting bars for said sets, the lower set of tumblers includingtumblers each arranged to operate one of said connecting bars, one onlyof said connecting bars being arranged to raise said emergency tumbler,a plurality of keys including a maids, housekeepers, guard and emergencykey, one side of said casing only having a key-hole, said key-hole beingadapted to receive said guard and emergency keys to operate directlyupon the upper set of tumblers and being adapted to receive the maidsand housekeepers key to operate directly upon the lower set of tumblers,said guard and emergency keys being so bitted as to project the deadbolt without raising the emergency tumbler, said maids and housekeeperskeys being so bitted as to raise the emergency tumbler through theagency of one of the tumblers of the lower set and one of saidconnecting bars whereby the bolt is blocked against operation by saidmaids and housekeepers key and may be retracted only by the guard or theemergency key when projected by said keys, and a thumb-turn arranged tooperate said lower set of tumblers and thereby one of said connectingbars to operate said upper tumblers, with the exception of saidemergency tumbler, whereby the bolt may be retracted by the guard oremergency keys from the outside or by the thumb-turn from the insideonly, when projected by the thumbturn from the inside.

5. In a lock, the combination with a casing of a dead bolt, two sets oftumblers therefor, one of said sets including an emergency tumblerprovided with a part adapted to be so positioned as to block theoperation of said dead bolt by certain keys, a pair of connecting barsfor said sets of tumblers, a second set including tumblers each adaptedto operate one of said connecting bars, said :asing having a key-holeupon one side only and said lock having a thumb-turn roll-back providedwith a thumb-turn at the opposite side only of said casing, a pluralityof keys including a maids housekeepers, guard and emergency key, saidkey-hole being adapted coive the maids and housekeepers keys in normalposition only to operate directly Copies of this patent may be obtainedfor five cents each, by addressing the Commissioner of Patents,Washington, D. 0.

upon the upper set of tumblers to project the dead bolt without raisingthe emergency tumbler, said keyhole being adapted to receive the maidsand housekeepers keys in inverted position only to operate upon thelower set of tumblers directly and to operate the upper set, includingthe emergency tumbler, through the agency of one of said connecting barswhereby when the dead bolt is projected by the guard and emergency keysit is blocked against retraction by the maids or housekeepers keys, saidthumb-turn being adapted to operate one only of said connecting bars inprojecting the dead bolt to operate the upper set of tumblers, with theexception of the emergency tumbler, whereby the dead bolt may beretracted by the guard or emergency keys or the thumb turn whenprojected by said thumb-turn.

HENRY Gr. VOIGHT. NORMAN B. HURD. Witnesses Gwnnnounn A. JACKSON, M. S.WVIARD.

It is hereby certified that in Letters Patent N 0. 1,024,467, grantedApril 23, 1912, upon the application of Henry G. Voight and Norman B.Hurd, of New Britain, Connecticut, for an improvement in Locks, an errorappears in the printed specification requiring correction as follows:Page 4:, line 23, for the syllable and words ceive the 'maids andhousekeepers read to receive sat'tt guard and emergency; and that thesaid Letters Patent should be read with this correction therein that thesame may conform to the record of the case in the Patent Oflice.

Signed and sealed this 14th day of- May, A D., 1912.

[SEAL] (J. O. BILLIN GS,

Acting Commissioner of Patents.

